Patent JPS557252A successfully refreshed from Google Patents.
JPS557252A
Expired / Lapsed
JP
⏱️ 0.0 years remaining
Preparatio of iminodiacetic acid
Assignee: YUKI GOSEI YAKUHIN KOGYO KK
•
Filing: 1978-07-03
•
Granted: —
•
Expires: 1998-07-03
Abstract
Abstract PURPOSE: To prepare iminodiacetic acid usable for various purposes, e.g. chelate group introducing bases, raw materials for medicines or pesticides, selectively on an industrial scale, by reacting easily available aminoacetic acid with NaCN or KCN and HCHO. CONSTITUTION: One mole of aminoacetic acid is reacted with 0.9W1.1 moles each of NaCH or KCN and HCHO at a pH of 9W10 and a temperature of 0W50°C for 10 minW2 hr to give an N-cyanomethyl derivative, which is hydrolyzed with an alkali hydroxide at 90W95°C to form iminodiacetic acid in high yield. COPYRIGHT: (C)1980,JPO&Japio
Inventors
- 👤 Tsutomu Nakao
- 👤 Tokuji Goto
- 👤 Akihiro Kigami
- 👤 Yoshitaka Naoi
- 👤 Koji Sakai
- 👤 Kiyomi Fujii
- 👤 Kyoichi Yoshida
Bibliographic Details
Application Number
—
Jurisdiction
JP
Data Source
google_patents
Last Synchronized
2026-11-05 18:51
CPC Classifications
—
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.